/* roulang page: index */
:root{
      --primary:#2563eb;
      --primary-strong:#1d4ed8;
      --primary-soft:#eff6ff;
      --primary-softer:#f6f9ff;
      --cyan:#06b6d4;
      --cyan-soft:#ecfeff;
      --warning:#f59e0b;
      --warning-soft:#fffbeb;
      --text:#0f172a;
      --muted:#475569;
      --subtle:#64748b;
      --border:#dbeafe;
      --border-2:#e2e8f0;
      --card:#ffffff;
      --bg:#f8fafc;
      --shadow:0 14px 36px rgba(15,23,42,.08);
      --shadow-hover:0 20px 48px rgba(37,99,235,.14);
      --radius-sm:12px;
      --radius:18px;
      --radius-lg:24px;
      --radius-xl:32px;
      --sidebar:248px;
      --container:1220px;
      --ease:all .24s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 82% 2%, rgba(6,182,212,.12), transparent 32%),
        radial-gradient(circle at 18% 8%, rgba(37,99,235,.10), transparent 28%),
        var(--bg);
      line-height:1.7;
      -webkit-font-smoothing:antialiased;
      text-rendering:optimizeLegibility;
    }
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{cursor:pointer;border:0;background:none}
    img{max-width:100%;display:block}
    .skip-link{
      position:absolute;left:-999px;top:8px;z-index:1000;
      background:var(--primary);color:#fff;padding:10px 14px;border-radius:10px;
    }
    .skip-link:focus{left:8px}
    .app-shell{min-height:100vh}
    .sidebar{
      position:fixed;inset:0 auto 0 0;width:var(--sidebar);z-index:50;
      background:rgba(255,255,255,.92);
      backdrop-filter:saturate(160%) blur(12px);
      border-right:1px solid var(--border-2);
      padding:22px 16px;
      display:flex;flex-direction:column;
      box-shadow:8px 0 28px rgba(15,23,42,.04);
    }
    .brand{
      display:flex;align-items:center;gap:12px;
      padding:10px 10px 18px;border-bottom:1px solid var(--border-2);
    }
    .brand-mark{
      width:42px;height:42px;border-radius:16px;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      color:#fff;font-weight:900;display:grid;place-items:center;
      box-shadow:0 12px 24px rgba(37,99,235,.22);
      flex:0 0 auto;
    }
    .brand-name{font-weight:900;letter-spacing:-.02em;line-height:1.25;font-size:17px}
    .brand-note{display:block;color:var(--subtle);font-size:12px;font-weight:600;margin-top:2px}
    .nav-group{padding:20px 0;display:grid;gap:8px}
    .nav-label{font-size:12px;color:var(--subtle);font-weight:800;padding:0 12px 4px}
    .nav-link{
      position:relative;
      min-height:46px;
      display:flex;align-items:center;gap:11px;
      color:var(--muted);
      padding:11px 12px;
      border-radius:15px;
      transition:var(--ease);
      font-weight:750;
    }
    .nav-link svg{width:19px;height:19px;stroke-width:2;flex:0 0 auto}
    .nav-link:hover{background:var(--primary-soft);color:var(--primary);transform:translateX(2px)}
    .nav-link.active{
      background:linear-gradient(90deg,#eff6ff,#fff);
      color:var(--primary);
      box-shadow:inset 3px 0 0 var(--primary);
    }
    .side-card{
      margin-top:auto;border:1px solid var(--border);border-radius:20px;
      background:linear-gradient(180deg,#fff,#eff6ff);
      padding:16px;
    }
    .side-card strong{display:block;font-size:14px;margin-bottom:6px}
    .side-card p{margin:0;color:var(--muted);font-size:12px;line-height:1.65}
    .mobile-topbar{display:none}
    .drawer-mask{display:none}
    .main{
      margin-left:var(--sidebar);
      min-height:100vh;
    }
    .container{
      width:min(var(--container), calc(100% - 64px));
      margin:0 auto;
    }
    .top-strip{
      padding:22px 0 0;
      display:flex;align-items:center;justify-content:space-between;gap:16px;
    }
    .breadcrumb{
      display:flex;align-items:center;gap:8px;color:var(--subtle);font-size:13px;font-weight:700;
    }
    .status-pill{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      border:1px solid #fed7aa;background:var(--warning-soft);color:#92400e;
      font-size:13px;font-weight:800;
    }
    .search-box{
      width:min(430px,100%);
      display:flex;align-items:center;gap:10px;
      background:#fff;border:1px solid var(--border-2);
      border-radius:16px;padding:10px 13px;
      box-shadow:0 8px 24px rgba(15,23,42,.04);
      transition:var(--ease);
    }
    .search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}
    .search-box input{border:0;outline:0;width:100%;color:var(--text);background:transparent}
    .search-box input::placeholder{color:#94a3b8}
    section{padding:42px 0}
    .hero{padding:30px 0 52px}
    .hero-panel{
      position:relative;overflow:hidden;
      border:1px solid var(--border);
      border-radius:36px;
      background:
        linear-gradient(120deg, rgba(239,246,255,.96), rgba(255,255,255,.96) 54%, rgba(236,254,255,.92)),
        radial-gradient(circle at 8% 18%, rgba(37,99,235,.12), transparent 22%);
      box-shadow:var(--shadow);
      padding:34px;
    }
    .hero-panel:before,.hero-panel:after{
      content:"";position:absolute;border-radius:999px;pointer-events:none;
      border:1px solid rgba(37,99,235,.12);
    }
    .hero-panel:before{width:220px;height:220px;right:-72px;top:-78px;background:rgba(37,99,235,.06)}
    .hero-panel:after{width:150px;height:150px;left:42%;bottom:-96px;background:rgba(6,182,212,.08)}
    .hero-grid{
      position:relative;z-index:1;
      display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:center;
    }
    .badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
    .badge,.tag{
      display:inline-flex;align-items:center;gap:7px;
      border-radius:999px;
      padding:7px 11px;
      font-size:12px;font-weight:850;
      border:1px solid var(--border);
      background:#fff;color:var(--primary);
    }
    .badge.warning{background:var(--warning-soft);border-color:#fde68a;color:#92400e}
    .badge.cyan{background:var(--cyan-soft);border-color:#a5f3fc;color:#0e7490}
    h1,h2,h3,p{margin-top:0}
    h1{
      font-size:clamp(32px,5vw,54px);
      line-height:1.12;
      letter-spacing:-.045em;
      margin-bottom:18px;
    }
    .hero-desc{
      color:var(--muted);
      font-size:17px;
      max-width:760px;
      margin-bottom:24px;
    }
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;
      padding:12px 18px;
      border-radius:999px;
      font-weight:850;
      transition:var(--ease);
      border:1px solid transparent;
      user-select:none;
    }
    .btn-primary{background:var(--primary);color:#fff;box-shadow:0 12px 24px rgba(37,99,235,.20)}
    .btn-primary:hover{background:var(--primary-strong);transform:translateY(-2px);box-shadow:0 18px 32px rgba(37,99,235,.24)}
    .btn-secondary{background:#fff;color:var(--primary);border-color:var(--border)}
    .btn-secondary:hover{background:var(--primary-soft);border-color:#bfdbfe;transform:translateY(-2px)}
    .btn-ghost{color:var(--muted);background:transparent;border-color:var(--border-2)}
    .btn-ghost:hover{color:var(--primary);background:#fff}
    .btn:focus-visible,.nav-link:focus-visible,.faq-question:focus-visible,.mobile-menu-btn:focus-visible,.drawer-close:focus-visible{
      outline:3px solid rgba(37,99,235,.24);outline-offset:2px;
    }
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;max-width:620px}
    .metric{
      background:rgba(255,255,255,.82);
      border:1px solid var(--border);
      border-radius:18px;
      padding:14px;
    }
    .metric b{display:block;font-size:22px;line-height:1.1;color:var(--primary)}
    .metric span{display:block;color:var(--subtle);font-size:12px;font-weight:700;margin-top:5px}
    .progress-stage{
      display:grid;grid-template-columns:220px 1fr;gap:18px;align-items:stretch;
    }
    .progress-card,.tier-card{
      background:#fff;border:1px solid var(--border);
      border-radius:28px;padding:20px;box-shadow:0 12px 26px rgba(15,23,42,.06);
    }
    .ring{
      --p:78;
      width:156px;height:156px;border-radius:50%;
      margin:8px auto 16px;
      background:conic-gradient(var(--primary) calc(var(--p)*1%), #dbeafe 0);
      display:grid;place-items:center;
      position:relative;
    }
    .ring:after{content:"";position:absolute;inset:14px;border-radius:50%;background:#fff}
    .ring-content{position:relative;z-index:1;text-align:center}
    .ring-content strong{display:block;font-size:32px;line-height:1;color:var(--text)}
    .ring-content span{font-size:12px;color:var(--subtle);font-weight:800}
    .progress-card h3,.tier-card h3{font-size:18px;margin-bottom:8px}
    .progress-card p,.tier-card p{font-size:13px;color:var(--muted);margin:0}
    .tier-list{display:grid;gap:10px;margin-top:14px}
    .tier{
      display:flex;justify-content:space-between;gap:10px;align-items:center;
      border:1px solid var(--border-2);border-radius:16px;
      padding:12px;background:#f8fbff;
      transition:var(--ease);
    }
    .tier:hover{border-color:#bfdbfe;background:#fff;transform:translateX(2px)}
    .tier strong{font-size:14px}
    .tier span{font-size:12px;color:var(--subtle);font-weight:700}
    .section-head{
      display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:20px;
    }
    .section-kicker{color:var(--primary);font-size:13px;font-weight:900;letter-spacing:.03em;margin-bottom:6px}
    h2{font-size:clamp(25px,3.2vw,36px);line-height:1.22;letter-spacing:-.03em;margin-bottom:10px}
    .section-desc{color:var(--muted);max-width:760px;margin:0;font-size:15.5px}
    .rail-wrap{position:relative}
    .rail{
      display:grid;grid-auto-flow:column;grid-auto-columns:minmax(245px,1fr);
      gap:16px;overflow-x:auto;padding:4px 2px 18px;
      scroll-snap-type:x proximity;
      scrollbar-width:thin;scrollbar-color:#bfdbfe transparent;
    }
    .rail::-webkit-scrollbar{height:8px}
    .rail::-webkit-scrollbar-thumb{background:#bfdbfe;border-radius:999px}
    .topic-card{
      scroll-snap-align:start;
      min-height:214px;background:#fff;border:1px solid var(--border-2);
      border-radius:24px;padding:16px;box-shadow:0 10px 28px rgba(15,23,42,.05);
      transition:var(--ease);
      display:flex;flex-direction:column;justify-content:space-between;
    }
    .topic-card:hover,.resource-card:hover,.matrix-card:hover,.update-item:hover{
      transform:translateY(-3px);
      border-color:#93c5fd;
      box-shadow:var(--shadow-hover);
    }
    .abstract{
      height:78px;border-radius:18px;margin-bottom:14px;
      background:
        radial-gradient(circle at 20% 22%,rgba(255,255,255,.75),transparent 21%),
        linear-gradient(135deg,#dbeafe,#ecfeff);
      position:relative;overflow:hidden;
    }
    .abstract:before{
      content:"";position:absolute;width:84px;height:84px;border-radius:28px;right:-18px;top:18px;
      background:rgba(37,99,235,.18);transform:rotate(18deg);transition:var(--ease);
    }
    .topic-card:hover .abstract:before{transform:rotate(30deg) translateY(-4px)}
    .topic-card h3{font-size:18px;margin:0 0 7px}
    .topic-card p{color:var(--muted);font-size:14px;margin:0 0 14px}
    .mini-link{font-size:13px;font-weight:900;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
    .resource-layout{
      display:grid;grid-template-columns:1.35fr .65fr;gap:18px;align-items:start;
    }
    .resource-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .resource-card{
      background:#fff;border:1px solid var(--border-2);border-radius:24px;overflow:hidden;
      box-shadow:0 10px 28px rgba(15,23,42,.05);transition:var(--ease);
    }
    .resource-cover{
      height:126px;padding:15px;display:flex;align-items:start;justify-content:space-between;
      background:linear-gradient(135deg,#eff6ff,#ecfeff);
      overflow:hidden;
    }
    .cover-icon{
      width:58px;height:58px;border-radius:20px;
      display:grid;place-items:center;color:#fff;font-weight:900;
      background:linear-gradient(135deg,var(--primary),var(--cyan));
      box-shadow:0 12px 22px rgba(37,99,235,.20);
    }
    .resource-body{padding:16px}
    .label-line{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
    .resource-body h3{font-size:19px;margin-bottom:8px}
    .resource-body p{color:var(--muted);font-size:14px;margin-bottom:12px}
    .side-panel{
      background:#fff;border:1px solid var(--border);border-radius:28px;padding:18px;
      box-shadow:var(--shadow);position:sticky;top:22px;
    }
    .check-list{list-style:none;margin:15px 0 0;padding:0;display:grid;gap:10px}
    .check-list li{
      display:flex;gap:10px;align-items:flex-start;
      background:#f8fbff;border:1px solid var(--border-2);
      border-radius:15px;padding:11px;color:var(--muted);font-size:14px;
    }
    .check{width:20px;height:20px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:12px;flex:0 0 auto;margin-top:2px}
    .matrix{
      display:grid;grid-template-columns:1fr 1.1fr;gap:18px;align-items:stretch;
    }
    .feature-stack{display:grid;gap:14px}
    .matrix-card{
      background:#fff;border:1px solid var(--border-2);border-radius:24px;padding:18px;
      box-shadow:0 10px 26px rgba(15,23,42,.05);transition:var(--ease);
    }
    .matrix-card h3{display:flex;align-items:center;gap:10px;font-size:18px;margin-bottom:8px}
    .dot{
      width:12px;height:12px;border-radius:50%;
      background:var(--cyan);box-shadow:0 0 0 5px rgba(6,182,212,.12);
    }
    .matrix-card p{color:var(--muted);font-size:14px;margin:0}
    .index-board{
      background:linear-gradient(180deg,#fff,#f8fbff);
      border:1px solid var(--border);
      border-radius:30px;padding:20px;
      display:grid;gap:12px;box-shadow:var(--shadow);
    }
    .index-row{
      display:grid;grid-template-columns:112px 1fr;gap:12px;align-items:center;
      border:1px solid var(--border-2);background:#fff;border-radius:18px;padding:12px;
    }
    .index-row strong{color:var(--primary)}
    .chip-group{display:flex;flex-wrap:wrap;gap:8px}
    .chip{background:var(--primary-soft);color:var(--primary);border:1px solid var(--border);border-radius:999px;padding:6px 10px;font-size:12px;font-weight:800}
    .news-layout{
      display:grid;grid-template-columns:1fr 360px;gap:18px;align-items:start;
    }
    .news-list,.recommend-box{
      background:#fff;border:1px solid var(--border-2);border-radius:28px;padding:18px;box-shadow:0 10px 28px rgba(15,23,42,.05);
    }
    .news-item{
      display:grid;grid-template-columns:116px 1fr auto;gap:14px;align-items:center;
      padding:14px;border-radius:18px;transition:var(--ease);
      border:1px solid transparent;
    }
    .news-item + .news-item{border-top:1px solid var(--border-2);border-radius:0}
    .news-item:hover{background:#f8fbff;border-color:var(--border);border-radius:18px}
    .news-date{font-size:13px;color:var(--subtle);font-weight:850}
    .news-item a{font-weight:900;color:var(--text)}
    .news-item a:hover{color:var(--primary)}
    .news-item p{font-size:13px;color:var(--muted);margin:3px 0 0}
    .arrow{color:var(--primary);font-weight:900}
    .recommend-box h3{font-size:20px;margin-bottom:12px}
    .topic-tags{display:flex;flex-wrap:wrap;gap:9px}
    .topic-tags a{
      padding:8px 11px;border-radius:999px;background:var(--primary-soft);
      border:1px solid var(--border);color:var(--primary);font-size:13px;font-weight:850;
      transition:var(--ease);
    }
    .topic-tags a:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
    .guard-bar{
      display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
      background:linear-gradient(135deg,#eff6ff,#fff);
      border:1px solid var(--border);border-radius:28px;padding:18px;box-shadow:var(--shadow);
    }
    .guard{
      background:#fff;border:1px solid var(--border-2);border-radius:20px;padding:16px;
    }
    .guard b{display:block;font-size:16px;margin-bottom:6px}
    .guard span{color:var(--muted);font-size:13px}
    .updates{
      display:grid;gap:12px;max-width:980px;
    }
    .update-item{
      display:grid;grid-template-columns:132px 1fr;gap:16px;
      background:#fff;border:1px solid var(--border-2);border-radius:22px;padding:16px;
      box-shadow:0 10px 24px rgba(15,23,42,.045);transition:var(--ease);
    }
    .version{
      display:inline-flex;justify-content:center;align-items:center;
      height:38px;border-radius:999px;background:var(--primary-soft);color:var(--primary);
      border:1px solid var(--border);font-weight:900;
    }
    .update-item h3{font-size:18px;margin-bottom:5px}
    .update-item p{color:var(--muted);font-size:14px;margin:0}
    .faq-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:20px;align-items:start}
    .faq-intro{
      background:linear-gradient(180deg,#fff,#eff6ff);
      border:1px solid var(--border);border-radius:28px;padding:22px;box-shadow:var(--shadow);
    }
    .faq-list{display:grid;gap:12px}
    .faq-item{
      border:1px solid var(--border-2);border-radius:20px;background:#fff;overflow:hidden;
      box-shadow:0 8px 22px rgba(15,23,42,.045);
    }
    .faq-question{
      width:100%;min-height:58px;padding:16px 18px;
      display:flex;justify-content:space-between;align-items:center;gap:16px;
      color:var(--text);font-weight:900;text-align:left;
    }
    .faq-question:hover{background:#f8fbff;color:var(--primary)}
    .faq-icon{width:24px;height:24px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;flex:0 0 auto;transition:var(--ease)}
    .faq-answer{display:none;padding:0 18px 18px;color:var(--muted);font-size:14px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff}
    .download-panel{
      overflow:hidden;position:relative;
      background:linear-gradient(135deg,#2563eb,#06b6d4);
      border-radius:32px;padding:28px;border:1px solid rgba(255,255,255,.4);
      color:#fff;box-shadow:0 22px 52px rgba(37,99,235,.22);
      display:grid;grid-template-columns:1fr 360px;gap:22px;align-items:center;
    }
    .download-panel:after{
      content:"";position:absolute;width:220px;height:220px;border-radius:50%;right:-70px;top:-80px;
      background:rgba(255,255,255,.16);
    }
    .download-panel h2{color:#fff}
    .download-panel p{color:rgba(255,255,255,.88);max-width:740px}
    .download-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
    .btn-white{background:#fff;color:var(--primary)}
    .btn-white:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(15,23,42,.16)}
    .btn-outline-white{border-color:rgba(255,255,255,.48);color:#fff;background:rgba(255,255,255,.08)}
    .btn-outline-white:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
    .guide-card{
      position:relative;z-index:1;background:rgba(255,255,255,.14);
      border:1px solid rgba(255,255,255,.32);border-radius:24px;padding:18px;
    }
    .guide-step{display:flex;gap:10px;align-items:flex-start;padding:10px 0}
    .guide-step + .guide-step{border-top:1px solid rgba(255,255,255,.2)}
    .num{width:26px;height:26px;border-radius:50%;background:#fff;color:var(--primary);display:grid;place-items:center;font-weight:900;flex:0 0 auto}
    .guide-step span{font-size:14px;color:rgba(255,255,255,.9)}
    .footer{
      margin-left:var(--sidebar);
      background:#eef4ff;border-top:1px solid var(--border);
      padding:34px 0;
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .8fr .8fr 1fr;gap:22px}
    .footer h3,.footer h4{margin:0 0 10px}
    .footer p,.footer a,.footer li{color:var(--muted);font-size:14px}
    .footer a:hover{color:var(--primary)}
    .footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
    .footer-brand{display:flex;gap:10px;align-items:center;margin-bottom:12px}
    .copyright{
      margin-top:24px;padding-top:18px;border-top:1px solid #dbeafe;
      color:var(--subtle);font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
    }

    @media (max-width:1180px){
      :root{--sidebar:226px}
      .hero-grid,.progress-stage,.matrix,.resource-layout,.news-layout,.faq-grid,.download-panel{grid-template-columns:1fr}
      .progress-stage{max-width:760px}
      .side-panel{position:static}
      .guard-bar{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:1023px){
      .sidebar{
        transform:translateX(-105%);
        transition:transform .28s ease;
        width:min(86vw,320px);
        z-index:80;
      }
      body.drawer-open .sidebar{transform:translateX(0)}
      .drawer-mask{
        display:block;position:fixed;inset:0;background:rgba(15,23,42,.42);
        opacity:0;pointer-events:none;transition:opacity .24s ease;z-index:70;
      }
      body.drawer-open .drawer-mask{opacity:1;pointer-events:auto}
      .mobile-topbar{
        display:flex;position:sticky;top:0;z-index:60;
        align-items:center;justify-content:space-between;gap:12px;
        padding:12px 16px;background:rgba(255,255,255,.94);
        backdrop-filter:saturate(160%) blur(12px);
        border-bottom:1px solid var(--border-2);
      }
      .mobile-menu-btn,.drawer-close{
        min-width:44px;height:44px;border-radius:14px;
        display:grid;place-items:center;background:var(--primary-soft);
        color:var(--primary);border:1px solid var(--border);
      }
      .drawer-close{position:absolute;right:14px;top:14px}
      .sidebar .brand{padding-right:54px}
      .main,.footer{margin-left:0}
      .container{width:min(100% - 32px,var(--container))}
      .top-strip{flex-direction:column;align-items:stretch}
      .search-box{width:100%}
      section{padding:34px 0}
      .hero-panel{border-radius:28px;padding:24px}
      .hero-metrics{grid-template-columns:1fr}
      .rail{grid-auto-columns:minmax(230px,78%)}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:720px){
      .section-head{display:block}
      .resource-grid{grid-template-columns:1fr}
      .index-row,.update-item,.news-item{grid-template-columns:1fr}
      .guard-bar{grid-template-columns:1fr}
      .download-panel{padding:22px;border-radius:26px}
      .download-actions .btn,.hero-actions .btn{width:100%}
      .footer-grid{grid-template-columns:1fr}
      .hero-panel{padding:20px}
      .metric b{font-size:20px}
      .progress-card,.tier-card{border-radius:22px}
      .ring{width:136px;height:136px}
    }

/* roulang page: category1 */
:root{
      --primary:#2563EB;
      --primary-dark:#1D4ED8;
      --primary-soft:#EFF6FF;
      --cyan:#06B6D4;
      --cyan-soft:#ECFEFF;
      --amber:#F59E0B;
      --amber-soft:#FFFBEB;
      --text:#0F172A;
      --muted:#475569;
      --weak:#64748B;
      --bg:#F6F9FF;
      --card:#FFFFFF;
      --line:#DBEAFE;
      --line-strong:#BFDBFE;
      --shadow:0 16px 40px rgba(15,23,42,.08);
      --shadow-hover:0 22px 56px rgba(37,99,235,.16);
      --radius-sm:12px;
      --radius:18px;
      --radius-lg:26px;
      --sidebar:252px;
      --container:1180px;
      --font:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:var(--font);line-height:1.7;color:var(--text);background:radial-gradient(circle at 88% 2%,rgba(37,99,235,.10),transparent 34%),linear-gradient(180deg,#F8FAFC 0%,var(--bg) 42%,#FFFFFF 100%);font-size:16px}
    a{color:inherit;text-decoration:none}
    img,svg{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 64px));margin:0 auto}
    .app-shell{min-height:100vh}
    .sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar);background:rgba(255,255,255,.92);border-right:1px solid var(--line);box-shadow:10px 0 32px rgba(15,23,42,.04);z-index:40;padding:22px 16px;display:flex;flex-direction:column;backdrop-filter:blur(12px)}
    .brand{display:flex;align-items:center;gap:12px;padding:10px 10px 20px;border-bottom:1px solid #E2E8F0}
    .brand-mark,.footer-brand .brand-mark{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--cyan));color:#fff;font-weight:900;letter-spacing:-.03em;box-shadow:0 10px 28px rgba(37,99,235,.24);flex:0 0 auto}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:17px;line-height:1.3}
    .brand-text span{font-size:12px;color:var(--weak)}
    .nav-group{padding:18px 0;display:grid;gap:8px}
    .nav-label{font-size:12px;color:#94A3B8;font-weight:800;letter-spacing:.08em;padding:0 12px;margin-bottom:4px}
    .nav-link{position:relative;display:flex;align-items:center;gap:11px;min-height:48px;padding:12px 12px;border-radius:15px;color:var(--muted);font-weight:750;transition:.22s ease;border:1px solid transparent}
    .nav-link svg{width:20px;height:20px;stroke-width:1.9;flex:0 0 auto}
    .nav-link:hover{background:var(--primary-soft);color:var(--primary);border-color:var(--line)}
    .nav-link.active{background:#EAF2FF;color:var(--primary);border-color:var(--line-strong)}
    .nav-link.active:before{content:"";position:absolute;left:-16px;top:12px;bottom:12px;width:3px;border-radius:999px;background:var(--primary)}
    .side-note{margin-top:auto;padding:14px;border:1px solid #FDE68A;background:var(--amber-soft);border-radius:18px;color:#92400E;font-size:13px}
    .main{margin-left:var(--sidebar);min-height:100vh}
    .mobile-bar{display:none;position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);padding:10px 16px;align-items:center;justify-content:space-between}
    .menu-btn,.close-btn{border:1px solid var(--line);background:#fff;color:var(--text);border-radius:14px;min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;transition:.2s}
    .menu-btn:hover,.close-btn:hover{background:var(--primary-soft);color:var(--primary)}
    .drawer-mask{position:fixed;inset:0;background:rgba(15,23,42,.42);z-index:70;opacity:0;pointer-events:none;transition:.24s}
    .drawer{position:fixed;inset:0 auto 0 0;width:min(86vw,340px);background:#fff;z-index:80;transform:translateX(-102%);transition:.28s ease;padding:18px;box-shadow:28px 0 70px rgba(15,23,42,.22);overflow:auto}
    .drawer.open{transform:translateX(0)}
    .drawer-mask.open{opacity:1;pointer-events:auto}
    .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}
    .section{padding:72px 0}
    .section-tight{padding:46px 0}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:13px;font-weight:850;border:1px solid var(--line)}
    .badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:850;background:var(--primary-soft);color:var(--primary);border:1px solid var(--line)}
    .badge.amber{background:var(--amber-soft);color:#B45309;border-color:#FDE68A}
    .badge.cyan{background:var(--cyan-soft);color:#0891B2;border-color:#BAE6FD}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 20px;border-radius:999px;font-weight:850;border:1px solid transparent;transition:.22s ease;white-space:nowrap}
    .btn-primary{background:var(--primary);color:#fff;box-shadow:0 14px 30px rgba(37,99,235,.22)}
    .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 18px 38px rgba(37,99,235,.28)}
    .btn-secondary{background:#fff;color:var(--primary);border-color:var(--line-strong)}
    .btn-secondary:hover{background:var(--primary-soft);transform:translateY(-2px)}
    .hero{padding:34px 0 62px}
    .deal-strip{display:grid;grid-template-columns:1.1fr auto auto;gap:14px;align-items:center;padding:14px 16px;margin-bottom:20px;border:1px solid #BAE6FD;background:linear-gradient(90deg,#ECFEFF,#EFF6FF);border-radius:22px;box-shadow:0 12px 30px rgba(6,182,212,.08)}
    .deal-strip strong{font-size:15px}
    .deal-strip p{margin:0;color:var(--muted);font-size:13px}
    .countdown{display:flex;gap:8px;align-items:center}
    .timebox{min-width:42px;text-align:center;padding:6px 8px;border-radius:12px;background:#fff;border:1px solid var(--line);font-weight:900;color:var(--primary)}
    .hero-card{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:32px;background:linear-gradient(135deg,#FFFFFF 0%,#F0F7FF 60%,#ECFEFF 100%);box-shadow:var(--shadow);padding:38px}
    .hero-card:before{content:"";position:absolute;right:-120px;top:-160px;width:360px;height:360px;border-radius:50%;background:rgba(37,99,235,.10)}
    .hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(340px,.92fr);gap:36px;align-items:center}
    h1{font-size:46px;line-height:1.14;margin:16px 0 18px;letter-spacing:-.05em}
    h2{font-size:31px;line-height:1.22;margin:0 0 14px;letter-spacing:-.035em}
    h3{font-size:20px;line-height:1.35;margin:0 0 8px}
    p{margin:0;color:var(--muted)}
    .lead{font-size:17px;color:var(--muted);max-width:680px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
    .hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
    .feature-panel{background:#fff;border:1px solid var(--line);border-radius:26px;padding:18px;box-shadow:0 14px 36px rgba(15,23,42,.07)}
    .product-card{border-radius:22px;background:linear-gradient(145deg,#F8FAFC,#EFF6FF);border:1px solid var(--line);padding:18px;margin-bottom:14px}
    .product-top{height:142px;border-radius:18px;background:radial-gradient(circle at 22% 28%,rgba(37,99,235,.22),transparent 34%),radial-gradient(circle at 82% 22%,rgba(6,182,212,.22),transparent 30%),linear-gradient(135deg,#DBEAFE,#FFFFFF);position:relative;overflow:hidden}
    .product-top:after{content:"欧美 · 国产";position:absolute;left:14px;bottom:14px;background:rgba(255,255,255,.88);border:1px solid var(--line);padding:6px 10px;border-radius:999px;color:var(--primary);font-weight:900;font-size:12px}
    .product-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}
    .price-like{font-size:24px;font-weight:950;color:var(--primary);letter-spacing:-.04em}
    .info-list{display:grid;gap:10px;margin-top:14px}
    .info-row{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:15px;background:#F8FAFC;border:1px solid #E2E8F0}
    .check{width:22px;height:22px;border-radius:999px;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;flex:0 0 auto;margin-top:1px}
    .filter-bar{display:flex;gap:10px;flex-wrap:wrap;padding:16px;border:1px solid var(--line);background:rgba(255,255,255,.86);border-radius:22px;box-shadow:0 10px 28px rgba(15,23,42,.05)}
    .filter-pill{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:999px;padding:9px 13px;font-weight:800;font-size:13px;transition:.2s}
    .filter-pill.active,.filter-pill:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
    .intro-layout{display:grid;grid-template-columns:.86fr 1.14fr;gap:28px;align-items:start}
    .summary-card{position:sticky;top:26px;border:1px solid var(--line);border-radius:26px;background:#fff;padding:24px;box-shadow:var(--shadow)}
    .summary-card ul{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:12px}
    .summary-card li{display:flex;gap:10px;color:var(--muted)}
    .card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
    .category-card,.mini-card,.faq-item,.notice-card{background:var(--card);border:1px solid #E2E8F0;border-radius:22px;box-shadow:0 10px 30px rgba(15,23,42,.05);transition:.22s ease}
    .category-card{overflow:hidden}
    .category-card:hover,.mini-card:hover,.notice-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
    .cover{height:118px;background:linear-gradient(135deg,#DBEAFE,#FFFFFF);position:relative;overflow:hidden}
    .cover:before,.cover:after{content:"";position:absolute;border-radius:999px;background:rgba(37,99,235,.14)}
    .cover:before{width:110px;height:110px;right:-18px;top:-24px}
    .cover:after{width:74px;height:74px;left:20px;bottom:-24px;background:rgba(6,182,212,.16)}
    .category-body{padding:18px}
    .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
    .card-link{display:inline-flex;align-items:center;color:var(--primary);font-weight:900;margin-top:14px}
    .split-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:26px;align-items:start}
    .mini-list{display:grid;gap:14px}
    .mini-card{padding:18px;display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start}
    .num{width:34px;height:34px;border-radius:13px;background:var(--primary-soft);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-weight:950;border:1px solid var(--line)}
    .scenario-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
    .notice-card{padding:20px}
    .notice-card .icon{width:48px;height:48px;border-radius:18px;background:linear-gradient(135deg,var(--primary-soft),#fff);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:950;margin-bottom:14px}
    .process{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:step}
    .process-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 10px 28px rgba(15,23,42,.05)}
    .process-item:before{counter-increment:step;content:"0" counter(step);display:inline-flex;color:var(--primary);font-weight:950;margin-bottom:10px}
    .safety-box{display:grid;grid-template-columns:1fr 1fr;gap:18px;border:1px solid #BAE6FD;background:linear-gradient(135deg,#ECFEFF,#FFFFFF);border-radius:28px;padding:24px}
    .safety-box ul{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .safety-box li{display:flex;gap:10px;color:var(--muted)}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;border:0;background:#fff;color:var(--text);padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;font-weight:900}
    .faq-q:hover{background:#F8FAFC}
    .faq-q span:first-child{font-size:16px}
    .faq-icon{width:28px;height:28px;border-radius:999px;background:var(--primary-soft);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;transition:.2s}
    .faq-a{display:none;padding:0 20px 18px;color:var(--muted)}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff}
    .cta{padding:0 0 76px}
    .cta-card{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;padding:30px;border-radius:30px;border:1px solid var(--line);background:linear-gradient(135deg,#EFF6FF 0%,#FFFFFF 58%,#ECFEFF 100%);box-shadow:var(--shadow);position:relative;overflow:hidden}
    .cta-card:after{content:"";position:absolute;right:-80px;bottom:-100px;width:260px;height:260px;border-radius:50%;background:rgba(37,99,235,.08)}
    .cta-card>*{position:relative}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
    .footer{background:#EEF4FF;border-top:1px solid var(--line);padding:42px 0 24px;margin-left:var(--sidebar)}
    .footer-grid{display:grid;grid-template-columns:1.35fr .75fr .75fr 1fr;gap:28px}
    .footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
    .footer h3,.footer h4{margin:0 0 12px;color:var(--text)}
    .footer h4{font-size:15px}
    .footer p,.footer a,.footer li{font-size:14px;color:var(--muted)}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
    .footer a:hover{color:var(--primary)}
    .copyright{border-top:1px solid #D7E5FF;margin-top:30px;padding-top:18px;display:flex;justify-content:space-between;gap:16px;color:var(--weak);font-size:13px}
    @media (max-width:1100px){
      :root{--sidebar:224px}
      .container{width:min(var(--container),calc(100% - 48px))}
      h1{font-size:38px}
      .hero-grid,.intro-layout,.split-section{grid-template-columns:1fr}
      .summary-card{position:static}
      .process{grid-template-columns:repeat(2,minmax(0,1fr))}
      .scenario-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:860px){
      .sidebar{display:none}
      .mobile-bar{display:flex}
      .main,.footer{margin-left:0}
      .hero{padding-top:22px}
      .deal-strip{grid-template-columns:1fr;align-items:start}
      .card-grid,.safety-box{grid-template-columns:1fr}
      .hero-card{padding:24px}
      .hero-grid{gap:24px}
      .feature-panel{order:-1}
      h1{font-size:34px}
      h2{font-size:26px}
      .cta-card{grid-template-columns:1fr}
      .cta-actions{justify-content:flex-start}
    }
    @media (max-width:560px){
      .container{width:calc(100% - 32px)}
      .section{padding:50px 0}
      .section-tight{padding:32px 0}
      .brand-text strong{font-size:15px}
      .hero-card{border-radius:24px;padding:20px}
      h1{font-size:30px;letter-spacing:-.035em}
      .lead{font-size:15px}
      .hero-actions,.cta-actions{display:grid;grid-template-columns:1fr}
      .btn{width:100%}
      .countdown{width:100%;justify-content:space-between}
      .timebox{flex:1}
      .filter-bar{overflow:auto;flex-wrap:nowrap;padding-bottom:14px}
      .filter-pill{white-space:nowrap}
      .process,.scenario-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr}
      .copyright{flex-direction:column}
    }

/* roulang page: category2 */
:root {
      --primary: #2563EB;
      --primary-strong: #1D4ED8;
      --primary-soft: #EFF6FF;
      --cyan: #06B6D4;
      --cyan-soft: #ECFEFF;
      --amber: #F59E0B;
      --amber-soft: #FFFBEB;
      --bg: #F6F9FF;
      --surface: #FFFFFF;
      --surface-2: #F8FAFC;
      --text: #0F172A;
      --muted: #475569;
      --subtle: #64748B;
      --border: #DBEAFE;
      --border-2: #E2E8F0;
      --shadow: 0 16px 45px rgba(15, 23, 42, 0.08);
      --shadow-hover: 0 22px 58px rgba(37, 99, 235, 0.16);
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --sidebar: 258px;
      --container: 1180px;
      --ease: 180ms ease;
      --font: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      text-size-adjust: 100%;
    }

    body {
      margin: 0;
      min-height: 100vh;
      font-family: var(--font);
      color: var(--text);
      background:
        radial-gradient(circle at 88% 8%, rgba(37, 99, 235, 0.10), transparent 30%),
        radial-gradient(circle at 15% 20%, rgba(6, 182, 212, 0.12), transparent 28%),
        linear-gradient(180deg, #F8FBFF 0%, var(--bg) 48%, #FFFFFF 100%);
      line-height: 1.72;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    button,
    input {
      font: inherit;
    }

    button {
      cursor: pointer;
      border: 0;
      background: none;
    }

    svg {
      width: 20px;
      height: 20px;
      stroke-width: 1.9;
      stroke-linecap: round;
      stroke-linejoin: round;
      flex: 0 0 auto;
    }

    .container {
      width: min(100%, var(--container));
      margin: 0 auto;
      padding: 0 40px;
    }

    .skip-link {
      position: fixed;
      left: 18px;
      top: 12px;
      z-index: 1000;
      transform: translateY(-140%);
      padding: 10px 14px;
      border-radius: 999px;
      background: var(--primary);
      color: #fff;
      box-shadow: var(--shadow);
      transition: transform var(--ease);
    }

    .skip-link:focus {
      transform: translateY(0);
      outline: 3px solid rgba(37, 99, 235, 0.24);
      outline-offset: 3px;
    }

    .app-shell {
      display: flex;
      min-height: 100vh;
    }

    .sidebar {
      position: fixed;
      inset: 0 auto 0 0;
      z-index: 70;
      width: var(--sidebar);
      padding: 22px 18px;
      background: rgba(255, 255, 255, 0.92);
      border-right: 1px solid var(--border);
      box-shadow: 8px 0 32px rgba(15, 23, 42, 0.05);
      backdrop-filter: blur(14px);
      display: flex;
      flex-direction: column;
      gap: 22px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 10px 16px;
      border-bottom: 1px solid var(--border-2);
    }

    .brand-mark,
    .mobile-brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--primary), var(--cyan));
      box-shadow: 0 12px 24px rgba(37, 99, 235, 0.18);
    }

    .brand-text {
      display: grid;
      gap: 1px;
      min-width: 0;
    }

    .brand-title {
      font-size: 16px;
      font-weight: 850;
      line-height: 1.25;
      color: var(--text);
    }

    .brand-subtitle {
      font-size: 12px;
      color: var(--subtle);
      white-space: nowrap;
    }

    .nav-group {
      display: grid;
      gap: 8px;
    }

    .nav-label {
      padding: 0 12px 2px;
      font-size: 12px;
      font-weight: 760;
      color: var(--subtle);
      letter-spacing: 0.06em;
    }

    .nav-link {
      position: relative;
      display: flex;
      align-items: center;
      gap: 11px;
      min-height: 46px;
      padding: 11px 12px 11px 14px;
      border-radius: 16px;
      color: var(--muted);
      font-weight: 720;
      border: 1px solid transparent;
      transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
    }

    .nav-link::before {
      content: "";
      position: absolute;
      left: 6px;
      top: 13px;
      bottom: 13px;
      width: 3px;
      border-radius: 999px;
      background: transparent;
      transition: background var(--ease);
    }

    .nav-link:hover {
      background: var(--primary-soft);
      color: var(--primary-strong);
      border-color: var(--border);
      transform: translateX(2px);
    }

    .nav-link.active {
      color: var(--primary-strong);
      background: #EAF2FF;
      border-color: #BFDBFE;
      box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.04);
    }

    .nav-link.active::before {
      background: var(--primary);
    }

    .side-note {
      margin-top: auto;
      padding: 16px;
      border-radius: 20px;
      background: linear-gradient(180deg, var(--amber-soft), #FFFFFF);
      border: 1px solid #FDE68A;
    }

    .side-note strong {
      display: block;
      margin-bottom: 6px;
      color: #92400E;
      font-size: 14px;
    }

    .side-note p {
      margin: 0;
      color: #78350F;
      font-size: 12px;
      line-height: 1.65;
    }

    .main {
      width: 100%;
      margin-left: var(--sidebar);
    }

    .mobile-header {
      display: none;
      position: sticky;
      top: 0;
      z-index: 60;
      padding: 12px 16px;
      background: rgba(255, 255, 255, 0.92);
      border-bottom: 1px solid var(--border);
      backdrop-filter: blur(14px);
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
      font-weight: 850;
      color: var(--text);
    }

    .mobile-brand span:last-child {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .menu-button,
    .drawer-close {
      width: 46px;
      height: 46px;
      border-radius: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-soft);
      color: var(--primary);
      border: 1px solid var(--border);
      transition: background var(--ease), transform var(--ease);
    }

    .menu-button:hover,
    .drawer-close:hover {
      background: #DBEAFE;
      transform: translateY(-1px);
    }

    .mobile-badge {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 4px 9px;
      border-radius: 999px;
      background: var(--amber-soft);
      color: #92400E;
      border: 1px solid #FDE68A;
      font-size: 12px;
      font-weight: 800;
      white-space: nowrap;
    }

    .drawer-mask {
      position: fixed;
      inset: 0;
      z-index: 80;
      background: rgba(15, 23, 42, 0.38);
      opacity: 0;
      visibility: hidden;
      transition: opacity var(--ease), visibility var(--ease);
    }

    .drawer {
      position: fixed;
      z-index: 90;
      inset: 0 auto 0 0;
      width: min(86vw, 330px);
      transform: translateX(-102%);
      transition: transform 240ms ease;
      background: #fff;
      border-right: 1px solid var(--border);
      box-shadow: 16px 0 46px rgba(15, 23, 42, 0.16);
      padding: 18px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    body.drawer-open .drawer-mask {
      opacity: 1;
      visibility: visible;
    }

    body.drawer-open .drawer {
      transform: translateX(0);
    }

    .drawer-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--border-2);
    }

    .section {
      padding: 72px 0;
    }

    .section-tight {
      padding: 48px 0;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary-strong);
      border: 1px solid var(--border);
      font-size: 13px;
      font-weight: 850;
      line-height: 1;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 99px;
      background: var(--cyan);
      box-shadow: 0 0 0 5px rgba(6, 182, 212, 0.13);
    }

    .hero {
      position: relative;
      overflow: hidden;
      margin: 28px auto 0;
      border-radius: 34px;
      border: 1px solid var(--border);
      background:
        radial-gradient(circle at 78% 20%, rgba(37, 99, 235, 0.16), transparent 28%),
        radial-gradient(circle at 18% 78%, rgba(6, 182, 212, 0.12), transparent 28%),
        linear-gradient(135deg, #FFFFFF 0%, #EFF6FF 54%, #F8FAFC 100%);
      box-shadow: var(--shadow);
    }

    .hero::after {
      content: "";
      position: absolute;
      inset: auto -12% -30% auto;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      background: rgba(37, 99, 235, 0.06);
      border: 36px solid rgba(37, 99, 235, 0.05);
      pointer-events: none;
    }

    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
      gap: 36px;
      align-items: center;
      padding: 54px;
    }

    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }

    h1 {
      margin-bottom: 18px;
      font-size: clamp(32px, 5vw, 54px);
      line-height: 1.12;
      letter-spacing: -0.045em;
      color: var(--text);
    }

    .hero-lead {
      margin: 0 0 24px;
      max-width: 720px;
      font-size: 17px;
      color: var(--muted);
    }

    .hero-actions,
    .cta-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 46px;
      padding: 12px 19px;
      border-radius: 999px;
      font-weight: 850;
      border: 1px solid transparent;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), color var(--ease), border-color var(--ease);
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
    }

    .btn-primary:hover {
      background: var(--primary-strong);
      transform: translateY(-2px);
      box-shadow: 0 18px 34px rgba(37, 99, 235, 0.28);
    }

    .btn-secondary {
      background: #fff;
      color: var(--primary);
      border-color: #BFDBFE;
    }

    .btn-secondary:hover {
      background: var(--primary-soft);
      transform: translateY(-2px);
      border-color: #93C5FD;
    }

    .btn:focus,
    .nav-link:focus,
    .faq-question:focus,
    .index-card:focus-within,
    .menu-button:focus,
    .drawer-close:focus,
    input:focus {
      outline: 3px solid rgba(37, 99, 235, 0.22);
      outline-offset: 3px;
    }

    .hero-panel {
      display: grid;
      gap: 14px;
      padding: 18px;
      border-radius: 26px;
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(191, 219, 254, 0.85);
      box-shadow: 0 20px 45px rgba(37, 99, 235, 0.10);
      backdrop-filter: blur(10px);
    }

    .panel-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 2px 2px 10px;
      border-bottom: 1px solid var(--border-2);
    }

    .panel-top strong {
      font-size: 17px;
      line-height: 1.3;
    }

    .age-chip,
    .privacy-chip,
    .tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 10px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 850;
      white-space: nowrap;
    }

    .age-chip {
      background: var(--amber-soft);
      color: #92400E;
      border: 1px solid #FDE68A;
    }

    .privacy-chip {
      background: var(--cyan-soft);
      color: #0E7490;
      border: 1px solid #A5F3FC;
    }

    .tag {
      color: var(--primary-strong);
      background: var(--primary-soft);
      border: 1px solid var(--border);
    }

    .step-list {
      display: grid;
      gap: 10px;
    }

    .step {
      display: grid;
      grid-template-columns: 34px 1fr;
      gap: 11px;
      align-items: start;
      padding: 12px;
      border-radius: 18px;
      background: #fff;
      border: 1px solid var(--border-2);
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .step:hover {
      transform: translateY(-2px);
      border-color: #BFDBFE;
      box-shadow: 0 12px 28px rgba(15, 23, 42, 0.07);
    }

    .step-num {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 900;
    }

    .step strong {
      display: block;
      margin-bottom: 2px;
      font-size: 14px;
    }

    .step span {
      display: block;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.55;
    }

    .summary-bar {
      margin-top: 22px;
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .summary-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 9px 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid var(--border);
      color: var(--muted);
      font-size: 13px;
      font-weight: 760;
    }

    .section-head {
      display: grid;
      grid-template-columns: minmax(0, 0.8fr) minmax(280px, 0.55fr);
      gap: 26px;
      align-items: end;
      margin-bottom: 28px;
    }

    .section-kicker {
      margin-bottom: 10px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 900;
      letter-spacing: 0.08em;
    }

    .section-title {
      margin-bottom: 0;
      font-size: clamp(26px, 3.4vw, 38px);
      line-height: 1.18;
      letter-spacing: -0.035em;
    }

    .section-desc {
      margin: 0;
      color: var(--muted);
      font-size: 15px;
    }

    .filter-strip {
      display: flex;
      gap: 10px;
      overflow-x: auto;
      padding: 4px 0 14px;
      scrollbar-width: thin;
      scrollbar-color: #BFDBFE transparent;
    }

    .filter-strip::-webkit-scrollbar {
      height: 5px;
    }

    .filter-strip::-webkit-scrollbar-thumb {
      background: #BFDBFE;
      border-radius: 999px;
    }

    .filter-chip {
      flex: 0 0 auto;
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 10px 14px;
      border-radius: 999px;
      border: 1px solid var(--border);
      background: #fff;
      color: var(--muted);
      font-size: 13px;
      font-weight: 820;
      box-shadow: 0 8px 22px rgba(15, 23, 42, 0.04);
      transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
    }

    .filter-chip.active,
    .filter-chip:hover {
      color: var(--primary-strong);
      background: #EAF2FF;
      border-color: #BFDBFE;
      transform: translateY(-1px);
    }

    .index-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 330px;
      gap: 24px;
      align-items: start;
    }

    .index-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
    }

    .index-card {
      position: relative;
      overflow: hidden;
      padding: 20px;
      border-radius: 24px;
      background: var(--surface);
      border: 1px solid var(--border-2);
      box-shadow: 0 12px 30px rgba(15, 23, 42, 0.055);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .index-card:hover {
      transform: translateY(-3px);
      border-color: #BFDBFE;
      box-shadow: var(--shadow-hover);
    }

    .index-card::after {
      content: "";
      position: absolute;
      right: -42px;
      top: -42px;
      width: 128px;
      height: 128px;
      border-radius: 42px;
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(6, 182, 212, 0.10));
      transform: rotate(16deg);
      transition: transform var(--ease);
    }

    .index-card:hover::after {
      transform: rotate(24deg) translate(-6px, 6px);
    }

    .card-icon {
      position: relative;
      z-index: 1;
      width: 48px;
      height: 48px;
      margin-bottom: 16px;
      border-radius: 17px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      background: var(--primary-soft);
      border: 1px solid var(--border);
    }

    .card-icon.cyan {
      color: #0E7490;
      background: var(--cyan-soft);
      border-color: #A5F3FC;
    }

    .index-card h3 {
      position: relative;
      z-index: 1;
      margin-bottom: 8px;
      font-size: 20px;
      line-height: 1.32;
      letter-spacing: -0.02em;
    }

    .index-card p {
      position: relative;
      z-index: 1;
      margin-bottom: 16px;
      color: var(--muted);
      font-size: 14px;
    }

    .meta-row {
      position: relative;
      z-index: 1;
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .resource-card {
      padding: 22px;
      border-radius: 26px;
      background: linear-gradient(180deg, #FFFFFF, #F8FBFF);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      position: sticky;
      top: 28px;
    }

    .resource-card h3 {
      margin-bottom: 12px;
      font-size: 21px;
    }

    .resource-card p {
      margin-bottom: 16px;
      color: var(--muted);
      font-size: 14px;
    }

    .mini-list {
      display: grid;
      gap: 11px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .mini-list li {
      display: grid;
      grid-template-columns: 24px 1fr;
      gap: 10px;
      padding: 11px;
      border-radius: 16px;
      background: #fff;
      border: 1px solid var(--border-2);
      color: var(--muted);
      font-size: 13px;
      line-height: 1.55;
    }

    .mini-list b {
      color: var(--primary);
      font-size: 15px;
      line-height: 1;
    }

    .compare-wrap {
      padding: 24px;
      border-radius: 30px;
      background: var(--surface);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .compare-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      overflow: hidden;
      border-radius: 22px;
      border: 1px solid var(--border-2);
      background: #fff;
    }

    .compare-table th,
    .compare-table td {
      padding: 17px 18px;
      text-align: left;
      vertical-align: top;
      border-bottom: 1px solid var(--border-2);
      color: var(--muted);
      font-size: 14px;
    }

    .compare-table th {
      color: var(--text);
      background: #F1F7FF;
      font-size: 14px;
      font-weight: 900;
    }

    .compare-table tr:last-child td {
      border-bottom: 0;
    }

    .compare-table td:first-child {
      color: var(--text);
      font-weight: 850;
      width: 18%;
    }

    .compare-mobile {
      display: none;
      gap: 14px;
    }

    .mobile-compare-card {
      padding: 17px;
      border-radius: 20px;
      background: #fff;
      border: 1px solid var(--border-2);
    }

    .mobile-compare-card h3 {
      margin-bottom: 10px;
      font-size: 18px;
    }

    .mobile-compare-card dl {
      margin: 0;
      display: grid;
      gap: 10px;
    }

    .mobile-compare-card dt {
      color: var(--primary);
      font-weight: 900;
      font-size: 13px;
    }

    .mobile-compare-card dd {
      margin: 3px 0 0;
      color: var(--muted);
      font-size: 14px;
    }

    .notice-grid {
      display: grid;
      grid-template-columns: 0.84fr 1.16fr;
      gap: 22px;
      align-items: stretch;
    }

    .notice-panel {
      padding: 26px;
      border-radius: 28px;
      background:
        linear-gradient(135deg, rgba(239, 246, 255, 0.92), rgba(255, 255, 255, 0.92)),
        radial-gradient(circle at 90% 10%, rgba(6, 182, 212, 0.12), transparent 24%);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
    }

    .notice-panel h2 {
      margin: 12px 0 12px;
      font-size: 30px;
      line-height: 1.22;
      letter-spacing: -0.03em;
    }

    .notice-panel p {
      margin-bottom: 0;
      color: var(--muted);
    }

    .check-grid {
      display: grid;
      gap: 14px;
    }

    .check-item {
      display: grid;
      grid-template-columns: 42px 1fr;
      gap: 13px;
      padding: 17px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--border-2);
      box-shadow: 0 10px 25px rgba(15, 23, 42, 0.045);
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .check-item:hover {
      transform: translateY(-2px);
      border-color: #BFDBFE;
      box-shadow: 0 16px 36px rgba(37, 99, 235, 0.12);
    }

    .check-mark {
      width: 42px;
      height: 42px;
      border-radius: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--cyan-soft);
      color: #0E7490;
      font-weight: 950;
    }

    .check-item strong {
      display: block;
      margin-bottom: 3px;
      font-size: 16px;
    }

    .check-item span {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.58;
    }

    .flow {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 16px;
    }

    .flow-card {
      position: relative;
      padding: 20px;
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--border-2);
      box-shadow: 0 12px 30px rgba(15, 23, 42, 0.055);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .flow-card:hover {
      transform: translateY(-3px);
      border-color: #BFDBFE;
      box-shadow: var(--shadow-hover);
    }

    .flow-num {
      width: 34px;
      height: 34px;
      margin-bottom: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: var(--primary);
      color: #fff;
      font-weight: 950;
    }

    .flow-card h3 {
      margin-bottom: 7px;
      font-size: 18px;
    }

    .flow-card p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .faq-wrap {
      display: grid;
      grid-template-columns: 0.42fr 0.58fr;
      gap: 26px;
      align-items: start;
    }

    .faq-intro {
      padding: 24px;
      border-radius: 28px;
      background: #fff;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
    }

    .faq-intro h2 {
      margin: 12px 0 10px;
      font-size: 31px;
      line-height: 1.2;
    }

    .faq-intro p {
      color: var(--muted);
      margin-bottom: 0;
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    .faq-item {
      border-radius: 20px;
      background: #fff;
      border: 1px solid var(--border);
      box-shadow: 0 10px 28px rgba(15, 23, 42, 0.045);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      min-height: 58px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 14px;
      padding: 17px 18px;
      color: var(--text);
      font-weight: 900;
      text-align: left;
      transition: background var(--ease), color var(--ease);
    }

    .faq-question:hover {
      background: var(--primary-soft);
      color: var(--primary-strong);
    }

    .faq-question .plus {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--primary-soft);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 950;
      transition: transform var(--ease), background var(--ease);
    }

    .faq-item.open .plus {
      transform: rotate(45deg);
      background: var(--primary);
      color: #fff;
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--muted);
      font-size: 14px;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .cta {
      margin-bottom: 72px;
    }

    .cta-card {
      position: relative;
      overflow: hidden;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 28px;
      align-items: center;
      padding: 34px;
      border-radius: 32px;
      background:
        radial-gradient(circle at 88% 10%, rgba(6, 182, 212, 0.16), transparent 28%),
        linear-gradient(135deg, #EAF2FF, #FFFFFF 58%, #EFF6FF);
      border: 1px solid #BFDBFE;
      box-shadow: var(--shadow);
    }

    .cta-card::before {
      content: "";
      position: absolute;
      right: 30%;
      bottom: -70px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(37, 99, 235, 0.08);
      pointer-events: none;
    }

    .cta-card > * {
      position: relative;
      z-index: 1;
    }

    .cta-card h2 {
      margin-bottom: 10px;
      font-size: clamp(25px, 3vw, 36px);
      line-height: 1.18;
      letter-spacing: -0.035em;
    }

    .cta-card p {
      max-width: 760px;
      margin-bottom: 0;
      color: var(--muted);
    }

    .footer {
      background: #EEF5FF;
      border-top: 1px solid var(--border);
      padding: 48px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.75fr 0.75fr 1fr;
      gap: 28px;
      align-items: start;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .footer-brand .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 13px;
      font-size: 13px;
    }

    .footer h3,
    .footer h4 {
      margin: 0 0 12px;
      color: var(--text);
      line-height: 1.25;
    }

    .footer h3 {
      font-size: 18px;
    }

    .footer h4 {
      font-size: 15px;
    }

    .footer p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    .footer ul {
      margin: 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 9px;
    }

    .footer a {
      color: var(--muted);
      font-size: 14px;
      transition: color var(--ease);
    }

    .footer a:hover {
      color: var(--primary);
    }

    .copyright {
      margin-top: 34px;
      padding-top: 18px;
      border-top: 1px solid #D7E8FF;
      display: flex;
      justify-content: space-between;
      gap: 14px;
      color: var(--subtle);
      font-size: 13px;
      flex-wrap: wrap;
    }

    @media (max-width: 1120px) {
      :root {
        --sidebar: 226px;
      }

      .container {
        padding: 0 28px;
      }

      .hero-grid {
        grid-template-columns: 1fr;
        padding: 42px;
      }

      .hero-panel {
        max-width: 680px;
      }

      .index-layout,
      .notice-grid,
      .faq-wrap {
        grid-template-columns: 1fr;
      }

      .resource-card {
        position: static;
      }

      .flow {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 860px) {
      .sidebar {
        display: none;
      }

      .mobile-header {
        display: flex;
      }

      .main {
        margin-left: 0;
      }

      .section {
        padding: 54px 0;
      }

      .section-tight {
        padding: 38px 0;
      }

      .hero {
        margin-top: 18px;
        border-radius: 26px;
      }

      .hero-grid {
        padding: 30px;
        gap: 26px;
      }

      .section-head {
        grid-template-columns: 1fr;
        gap: 12px;
        align-items: start;
      }

      .index-grid {
        grid-template-columns: 1fr;
      }

      .compare-table {
        display: none;
      }

      .compare-mobile {
        display: grid;
      }

      .cta-card {
        grid-template-columns: 1fr;
        padding: 28px;
      }
    }

    @media (max-width: 560px) {
      .container {
        padding: 0 16px;
      }

      .mobile-header {
        padding: 10px 12px;
      }

      .mobile-badge {
        display: none;
      }

      .brand-title,
      .mobile-brand span:last-child {
        font-size: 14px;
      }

      .hero-grid {
        padding: 22px;
      }

      h1 {
        font-size: 31px;
      }

      .hero-lead {
        font-size: 15px;
      }

      .hero-actions,
      .cta-actions {
        align-items: stretch;
        flex-direction: column;
      }

      .btn {
        width: 100%;
      }

      .panel-top {
        align-items: flex-start;
        flex-direction: column;
      }

      .summary-bar {
        display: grid;
      }

      .filter-strip {
        margin-right: -16px;
        padding-right: 16px;
      }

      .compare-wrap,
      .notice-panel,
      .faq-intro,
      .cta-card {
        border-radius: 24px;
        padding: 20px;
      }

      .flow {
        grid-template-columns: 1fr;
      }

      .check-item {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .copyright {
        display: grid;
      }
    }